I need to find regex to parse a variable

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I need to find regex to parse a variable

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#1 by (0 votes)

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I need to parse a C code using regex and I'm having difficulty knowing if a variable is getting a float or integer value.

Ex:

valor_01 = ( 5 * 3 ) / 2.5 + ( 4 % 3 ) ^ 4 ;

valor_01 can be any variable name, something like \w+

I need to catch if after = and before ; has some decimal value ( 2.5 in this example)

So far I've got the following expression:

(\w+\s?\=\s?).+

Problem: With this expression I get the name of the variable, the equal and everything I have on the line and I can not find out if it has a (\d+.\d+) and a ; at the end of the line.

It's like I need to capture

value_01 = 2.5;

javascript regex

asked by anonymous 19.11.2018 / 00:04

1 answer

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score 0 · Answer 1

I do not see the need to validate the variable name. Variable names can not contain points, if there is a point anywhere in the string, there is a float.

Anyway, if you want to validate the entire expression:

\w+ letters or numbers or underscores

\s* followed or not by spaces

= followed by an equal

[\d\+\-\*\/\s]* followed or not by numbers, algebraic expressions and spaces

\.\d followed by a period followed by a number

[\d\+\-\*\/\s]* followed or not by numbers, algebraic expressions and spaces

; followed by a semicolon

That is \w+\s*=[\d\+\-\*\/\s]*\.\d[\d\+\-\*\/\s]*;